$(function(){
  // alert("product_detail");
  $.getUrlParam = function (name) {
    var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
    var r = window.location.search.substr(1).match(reg);
    if (r != null) return unescape(r[2]); return null;
}

let id = $.getUrlParam('id');
console.log(id)
  });
  $('#submitBtn').click(function(){
    window.history.back(-1); 
  })